US doctor exposed to Ebola virus admitted to NIH

WASHINGTON - An American doctor who was exposed to the Ebola virus while volunteering in Sierra Leone has been admitted for observation at The National Institutes of Health near the nation's capital.

NIH confirmed in a news release on its website that the physician arrived Sunday.

NIH had said previously that out of "an abundance of caution," the physician is being admitted to a special isolation unit. NIH infectious disease chief Dr. Anthony Fauci wouldn't discuss details about the patient but said that in general, an exposure to Ebola doesn't necessarily mean someone will become sick.

Four other Americans aid workers who were infected with Ebola while volunteering in the West African outbreak have been treated at hospitals in Georgia and Nebraska. One remains hospitalized while the others have recovered.